Flange oil and process of making same



Patented Dec. 31, 1935 2,026,491

UNITED STATES PATENT OFFICE- 2,026,491 FLANGE OIL AND rnoons's OF MAKING SAME Harry T. Bennett, Tulsa, Okla., assignor to Mid- Continent Petroleum Corporation, Tulsa, Okla, a corporation of Delaware No Drawing. Application October 10, 1932, Serial No. 637,097

4 Claims. (Cl. 196-151) This invention relates to lubricants and methtillation of petroleum was distilled under an absoods of making the same, and more specifically it lute pressure of 60 millimeters until the desired relates to lubricants for railway track curves and high viscosity residuum was obtained. locomotive or car wheel flanges. This high viscosity residuum was then blended 5 This application is a continuation in part of with pressure tar to produce a product with 36 5 my copending application, Serial No. 423,558, percent of high viscosity residuum and 64 perfiled January'25, 1930 relating to lubricants of cent pressure tar. An analysis of these two rethis kind, which are frequently termed flange siduums is as follows:

oils. Flange oil mustadhere or stick tenaciously to High viscosity Pressure metal tracks, or rails, even in the presence of V residum tar steam, but it must be fluid enough to flow freely from the oiler. Gravity 13.1 6. 7 I have found that by distilling the residuum g g g tf f g g g 13 2 3, 15 resulting from a fractional distillation of petroum Vscoslya 15 leum, an adhesive residuum is produced which has the property of adhering very tenaciously to blendmg P Y foregomspmducts metal. However, the viscosity of this residual oil, duced a flange 011 the followmg propertles: which may range from about 10,000 to 35,000 Gravity 8.7 Furol viscosity at 122 F., is so high that said Oil Furol iscosity t 122 F 245 20 cannot be used alone as a flange oil. Sediment (ASTM method) 0.2 I have also found that the product known as Flash (Cleveland pen) 265 pressure tar, which is the residuum produced Fire 365 when petroleum products are cracked while subjected to heat and pressure, has the property of As a further illustration of this nvention, I 25 adhering tenaciously to meta1s However the have also made an excellent flange o l by blendviscosity of this product which may range from F percent of residuum Fuel 10 to 125 Furol viscosity at 122 F. is too low to be Vlscoslty of 34,668 at 122 wlth percent used as flange 01L of a pressure tar having a Furol viscosity of 50 I have discovered, however, that an ideal lubriat 30' cant or flange oil with a Furol viscosity at 122 F. T resultant flange 011 had the followms pof 200 to 375 can be produced by blending the ertlesi h viscosity residuum with the pressure tar Gravity 39 which a a! relatively 10W viscosity. Furol Viscosity t 1220 F 250 35 U ually it requires 50 to '75 percent of pressure sediment (ASTM method) 0'2 35 and 50 to 25 percent of the high viscosity Flash (Cleveland open) 2 5 residuum, to produce an oil which flows as de- Fire 360 sired. This invention, however, is not limited t th above percentage5 It is understood that th s invention is not 40 In the preferred form of this invention, the limited to the foregomg speclfic examples- 40 high viscosity residuum is obtained by distilling, I Claimi under a pressure less than atmospheric pressure, A flan e Oil having Fllrol VISOOSIW b a residuum resulting from the fractional distillatween 200 and 3'75, said oil comprising 50 to 25 tion of petroleum. The pressure during the dispercent of an adhesive residuum resulting from tilling operation will usually be from to 200 a fractional distillation of petroleum and hav- 46 millimeters absolute pressure. ing a Furol viscosity between 10,000 to 35,000 at As an example of one form of this invention, I 122 F., and 50 to percent of an adhesive will show how I have made an excellent flange residuum resulting from a cracking operation oil as follows: and having a Furol viscosity between 10 and 60 50 A residuum resulting from the fractional disat 122 F.

2. The process of making flange oils which comprises distilling, under a pressure less than atmospheric pressure, a residuum resulting from fractional distillation of petroleum to provide an adhesive residuum having a Furol viscosity of more than 10,000 at 122 F., and mixing said adhesive residuum with a low viscosity petroleum residuum resulting from a cracking operation and having a Furol viscosity from 10 to 125 at 122 F. to produce a flange oil having a Furol viscosity of more than 200 at 122 F.

3. The process of making flange oils which comprises distilling under a pressure less than atmospheric pressure, a residuum resulting from fractional distillation of petroleum to provide an adhesive residuum having a Furol viscosity of more than 10,000 at 122 F., and mixing with said adhesive residuum a quantity of a pressure tar resulting from a cracking operation amounting to 50 to 75 percent of the volume of the resultant mixture and having a Furol viscosity from 10 to 125 at 122 F.

4. The process of making flange oils which comprises distilling, under an absolute pressure of 50 to 200 millimeters, a residuum resulting from fractional distillation of petroleum to provide an adhesive residuum having a Furol viscosity between 10,000 and 35,000 at 122 F. and mixing said adhesive residuum with 50 to 75 percent of a petroleum residuum resulting from a cracking operation and having a Furol viscosity between 10 and 125 at 122 F.

HARRY T. BENNETT. 

